638 Answered Questions for the topic AP chemistry

Ap Chemistry

01/19/20

What is first ionization energy?
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Ap Chemistry

01/19/20

What is a mass spectrum?
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Ap Chemistry

01/19/20

what does (n=5 to n=2) have to do with wavelength?
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Ap Chemistry

01/19/20

What has a greater ionization energy, an element with a positive, negative, or neutral charge?
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Ap Chemistry

01/19/20

What is more excited, an electron configuration that has two partially filled rings, or a halogen that is one proton away from being a noble gas (stable
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Ap Chemistry

01/19/20

What is the relationship between reactivity and ionization energy?
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Ap Chemistry Chemistry Chem

12/13/19

What mass of carbon is present in 8.02 x 10^23 formula units of Al2(CO3)3?
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Ap Chemistry Chemistry Chem

12/06/19

How many half-lives occurred if 5.2 x 10^24 atoms of Pb-212 decay into 0.54 miles of Bi-212? Round to nearest whole number.
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Ap Chemistry Chemistry Chem

11/26/19

For many purposes we can treat ammonia NH3 as an ideal gas at temperatures above its boiling point of -33 degrees celsius.
Suppose the temperature of a sample of ammonia gas is raised from -14.0 °C to 21.0 °C, and at the same time the pressure is changed. If the initial pressure was 6.5 atm and the volume increased by... more
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Ap Chemistry Chemistry Chem

11/24/19

Consider the following balanced reaction. HCl (aq) + KOH (aq) → H2O (l) + KCl (aq)

In a beaker, 250.0 mL of 0.25 M HCl and 200.0 mL of 0.40 M KOH are mixed. After reaction, is the solution acidic, neutral, or basic? What is the pH of the solution at the end of the... more
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Ap Chemistry Chemistry Chem

11/24/19

Calculate the pH of a 0.0065 M solution of NaOH. Report answer to two decimal places.
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Ap Chemistry Chemistry Chem

11/19/19

A student mixes 20.00 mL of 0.190 M Ca(NO3)2 and 12.00 mL of 0.150 M Na2CO3. What is the limiting reactant? Show your work.
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Ap Chemistry Chemistry Chem

11/19/19

How would your results (percent yield) be affected if you spilled some of your reaction mixture while trying to filter your product? Be specific and give an explanation.
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Ap Chemistry Chemistry Chem

11/18/19

What volume (in mL) of 4.46 M HCl is required to fully react with 19.3 mL of 2.13 M Ca(OH)2?
Consider the following balanced equation.2HCl (aq) + Ca(OH)2 (aq)  2H2O (l) + CaCl2 (aq)
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Ap Chemistry Chemistry Chem

11/18/19

Calculate the amount of heat absorbed (in kJ) when 35.15 g of CO2 reacts.
2Fe3O4 (s) + CO2 (g)  3Fe2O3 (s) + CO (g)     H = 47.2 kJ
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Ap Chemistry Chemistry Chem

11/18/19

If 1.49 grams of NO react, how many grams of NO2 form?
Consider the following balanced reaction.2H+ (aq) + 2NO3- (aq) + NO (g)  3NO2 (g) + H2O (l)
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11/17/19

Why does Kr have larger radius than Ar when Kr has a larger effective nuclear charge?
Looking at the atomic radius trend of the periodic table, Kr has a larger radius than Ar. But my textbook claims that Kr has a larger effective nuclear charge than Ar for n=3. Wouldn't that mean Kr... more
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Ap Chemistry Chemistry Chem

11/16/19

Consider the following balanced chemical equation: 2K3PO4 (aq) + 3MgBr2 (aq) ----> Mg3(PO4)2 (s) + 6KBr (aq)

A 97.17 mL sample of 1.4 M K3PO4 is mixed with 45.24 mL of 0.615 M MgBr2. After reaction, what is the concentration of the excess reactant (in M)?
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Ap Chemistry Chemistry Chem

11/16/19

Consider the following balanced chemical equation: 4Na (s) + O2 (g) ----> 2Na2O (s) . Calculate the volume of O2 gas (in L) needed at STP to react with 89 g Na.
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Ap Chemistry Chemistry Chem

11/15/19

A chemist prepares a solution of iron chloride by measuring out 0.10 g of FeCl2 into a 50. mL volumetric flask and filling to the mark with distilled water.

Calculate the molarity of anions in the chemist's solution.
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Ap Chemistry Chemistry Chem

11/14/19

Fluorine gas and water vapor react to form hydrogen fluoride gas and oxygen. What volume of hydrogen fluoride would be produced by this reaction if 4.8 cm^3 of fluorine were consumed?

Answer has a unit symbol, and is rounded to the correct number of significant digits.
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Ap Chemistry Chemistry Chem

11/14/19

Hydrogen chloride gas and oxygen react to form water vapor and chlorine gas. What volume of water would be produced by this reaction if 7.7 cm^3 of hydrogen chloride were consumed?
Answer has a unit symbol, and is rounded to the correct number of significant digits.
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Ap Chemistry Chemistry Chem

11/13/19

Suppose 22. g of octane is mixed with 98.0 g of oxygen. Calculate the maximum mass of carbon dioxide that could be produced by the chemical reaction.
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Ap Chemistry Chemistry Chem

11/12/19

Balance the molecular equation below and write the balanced complete and net ionic equations for the following unbalanced molecular reaction.
_SrBr2(aq) + _K2SO4(aq) ------> _SrSO4(s) + _KBr(aq)
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Ap Chemistry Chemistry Chem

11/06/19

A student has prepared a 150.0 mL of 2.25 M Na3PO4. What is the chemical equation for the dissolving of Na3PO4 in water?
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